The problem is too difficult for him. He _______ solve it by himself without any help.
| A．can't | B．mustn't | C．shouldn't | D．needn't |
They were________their invention．They thought they could invent more things to make our life easier．
| A．angry with |
| B．proud of |
| C．strict in |
| D．tired of |
Thank you for helping me a lot．I am________to you．
| A．patient |
| B．interested |
| C．thankful |
| D．bored |
The students are full of energy．They are thirsty ________knowledge．
| A．with | B．for | C．as | D．on |
—I’m looking forward to_______my parents soon．What about you？
—Me，too．
A．seeing
B．see
C．saw
—Would you like to tell me________？
—Sure．Practice makes perfect．
| A．how can I study English well |
| B．why do you learn English well |
| C．how I can study English well |
| D．why I learn English well |